fuse: add fuse_should_enable_dax() helper

This is in prep for following per inode DAX checking.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c
index 713818d74de6cfcf93d079eee7e726c3660c2fbe..8057fbf5576c5174f9b3b69ed4a27534f0ec7c4e 100644 (file)
--- a/fs/fuse/dax.c
+++ b/fs/fuse/dax.c
@@ -1327,11 +1327,19 @@ static const struct address_space_operations fuse_dax_file_aops  = {
        .invalidatepage = noop_invalidatepage,
 };
 
-void fuse_dax_inode_init(struct inode *inode)
+static bool fuse_should_enable_dax(struct inode *inode)
 {
        struct fuse_conn *fc = get_fuse_conn(inode);
 
        if (!fc->dax)
+               return false;
+
+       return true;
+}
+
+void fuse_dax_inode_init(struct inode *inode)
+{
+       if (!fuse_should_enable_dax(inode))
                return;
 
        inode->i_flags |= S_DAX;